I've noticed a fault with the picture on my parents 32" Sony FQ75. Basically at certain times, (dependant on what's being shown on the screen), purple patches are noticeable in the lower right corner. 2 small patches infact. It seems to me that the purple patches are mainly visible if the screen is displaying a strong red colour in that area at the time. Can anyone suggest what this is as the tv is still under warranty. Parents haven't mentioned it to be honest, so I'm more concrened about the possibilty of it worsening.